Fusion energy heat feedback system loop structure

Abstract

The invention relates to the technical field of fusion energy heat feedback systems, in particular to a loop structure of a fusion energy heat feedback system. According to the technical scheme, the device comprises a cladding cooling loop and a divertor cooling loop; the cladding cooling loop comprises a cladding, a main circulating pump I, a steam generator, a heater and a voltage stabilizer I which are connected in sequence to form a loop; the first main circulating pump is connected with a first baking small-flow pump in parallel, the steam generator is connected with a first flow adjusting valve and a first baking cooler in parallel, and the heater is connected with a second flow adjusting valve in parallel. The divertor cooling loop comprises a divertor, a second main circulating pump, a main heat exchanger, a second baking small-flow pump and a second voltage stabilizer which are sequentially connected to form the loop. The problem of high-temperature baking of internal parts of the fusion reactor is effectively solved, fusion energy is safely, stably and efficiently output for power generation, energy shortage and environmental pollution are relieved, the practical process of nuclear fusion energy is accelerated, and the system has multiple safety guarantee mechanisms.

Description

Technical Field

[0001] The present invention relates to the technical field of fusion energy heat feeding systems, and in particular to a loop structure of a fusion energy heat feeding system. Background Art

[0002] At present, the energy for human activities mainly comes from fossil energy on the earth, but fossil energy has the disadvantages of limited reserves and pollution to the atmosphere, while renewable energy (such as wind energy, solar energy, tidal energy) is limited by natural factors, so all countries are facing the problem of energy shortage and environmental pollution. At present, the tokamak experimental devices under construction in the world mainly include the International Thermonuclear Experimental Reactor I TER, Japan's JT-60SA, the European Union's JET, South Korea's K-Star and China's EAST, but these are only tokamak plasma experimental devices, and fusion power stations that can generate electricity are still in the research and development stage.

[0003] The deuterium-tritium plasma in the tokamak vacuum chamber undergoes fusion reaction. The divertor and blanket, as internal components directly facing the plasma in the vacuum chamber, will be subjected to high-energy particle flow and heat flow from the central plasma, and the thermal power borne by their first wall surface will reach the gigawatt level. It can be predicted that the heat flux density on the first wall surface of the blanket will be as high as several megawatts per square meter, and the heat flux density on the first wall surface of the divertor facing the plasma will be as high as ten megawatts per square meter. The function of the fusion energy heat feed system is to transfer the heat load deposited on the blanket and divertor to the steam power generation system for power generation. At the same time, it also provides high-temperature baking for the fusion reactor vacuum chamber to form a high vacuum environment that meets the plasma operation. At present, there is an urgent need for a set of effective fusion energy heat feed system loop structure to overcome the problem of high-temperature baking of internal components of the fusion reactor, to ensure the safe, stable and efficient output of fusion energy for power generation, and to accelerate the practical application of nuclear fusion.

[0004] In summary, the present application proposes a fusion energy heat feed system loop structure. Summary of the invention

[0005] The purpose of the present invention is to propose a fusion energy heat feed system loop structure to address the problem that there is no effective fusion energy heat feed system loop structure in the background technology to overcome the high-temperature baking problem of internal components of fusion reactors.

[0006] The technical solution of the present invention is a fusion energy heat feed system loop structure, comprising:

[0007] Blanket cooling loop and divertor cooling loop;

[0008] The blanket cooling loop includes a blanket, a main circulation pump 1, a steam generator, a heater, and a pressure stabilizer 1 which are connected in sequence to form a loop;

[0009] The main circulation pump 1 is connected in parallel with a baking small flow pump 1, the steam generator is connected in parallel with a flow regulating valve 1 and a baking cooler 1, and the heater is connected in parallel with a flow regulating valve 2;

[0010] The divertor cooling loop comprises a divertor, a second main circulation pump, a main heat exchanger, a second baking small flow pump, and a second stabilizer, which are connected in sequence to form a loop;

[0011] The second baking small flow pump is respectively connected to a baking heater, a flow regulating valve three and a baking cooler two, and the baking heater, the flow regulating valve three and the baking cooler two are arranged in parallel and communicated between the divertor and the main circulation pump two;

[0012] A pressure relief assembly is connected between the blanket cooling loop and the divertor cooling loop.

[0013] Optionally, safety isolation valve 1 and safety isolation valve 2 are connected in sequence between the cladding and main circulation pump 1, and stop valve 1 and stop valve 2 are connected in sequence between the main circulation pump 1 and the steam generator; stop valve 3 and stop valve 4 are connected in sequence between the steam generator and the heater; safety isolation valve 3 and safety isolation valve 4 are connected in sequence between the stabilizer 1 and the cladding.

[0014] Optionally, a stop valve five is connected between the baking small flow pump one and the stop valve two, and a stop valve six and a stop valve seven are respectively installed at both ends of the divertor.

[0015] Optionally, a safety isolation valve 5 and a safety isolation valve 6 connected in sequence are installed between the divertor and the main circulation pump 2, and a stop valve 8 is installed between the main circulation pump 2 and the main heat exchanger;

[0016] A safety isolation valve 7 and a safety isolation valve 8 which are connected in sequence are installed between the stabilizer 2 and the divertor.

[0017] Optionally, a stop valve nine is installed between the baking small flow pump two and the baking cooler two, and a stop valve ten is installed between the baking small flow pump two and the baking heater.

[0018] Optionally, the pressure relief assembly includes a pressure relief box, to which pressure relief valve one and pressure relief valve two are respectively connected, pressure stabilizer one is connected to pressure relief valve one, and pressure relief valve two is connected to pressure stabilizer two.

[0019] Optionally, the steam generator is connected to a main heat exchanger, a safety isolation valve nine and a safety isolation valve ten are connected to the main heat exchanger, and the steam generator is connected to a safety isolation valve eleven and a safety isolation valve twelve in sequence.

[0020] Optionally, the operating modes of the fusion energy heat feed system loop structure include power generation mode and baking mode.

[0021] Optionally, in the power generation mode, the safety isolation valve 1, the safety isolation valve 2, the stop valve 1, the stop valve 2, the stop valve 3, the stop valve 4, the safety isolation valve 3, and the safety isolation valve 4 in the cladding loop are opened, and the stop valve 5, the stop valve 6, and the stop valve 7 are closed;

[0022] After the cooling water is heated by the blanket, part of it passes through the heater and part passes through the second flow regulating valve. After the water is merged, it passes through the steam generator to heat the secondary side feed water to generate steam, which is then sent to the steam turbine to drive the steam turbine to generate electricity.

[0023] It is then pressurized by main circulation pump 1 and re-injected into the blanket. When the fusion reactor is in non-steady-state operation, the heater is turned on to heat the cooling water in order to produce steam to maintain the minimum speed of the turbine; the safety isolation valves 5, 6, 7 and 8 in the divertor loop are opened, the stop valves 9 and 10 are closed, and the flow regulating valve 3 is closed. After the cooling water is heated by the divertor, it passes through the main heat exchanger to heat the high-pressure feed water on the secondary side, and then is pressurized by main circulation pump 2 and backfilled into the divertor.

[0024] Optionally, the baking mode includes a baking heating mode and a baking cooling mode;

[0025] In the baking heating mode, the safety isolation valve 1, the safety isolation valve 2, the safety isolation valve 3, and the safety isolation valve 4 in the cladding loop are opened, the stop valve 4 and the stop valve 5 are opened, the stop valve 1, the stop valve 2, the stop valve 3, the stop valve 6, and the stop valve 7 are closed, the flow regulating valve 1 is opened, and the flow regulating valve 2 is closed, the cooling water is heated by the heater and passes through the flow regulating valve 1, and then is pressurized by the baking small flow pump 1 and then injected into the cladding for high-temperature baking;

[0026] In the baking heating mode, the safety isolation valve 5, the safety isolation valve 6, the safety isolation valve 7, and the safety isolation valve 8 in the divertor loop are opened, the stop valve 10 is opened, the stop valve 9, the flow regulating valve 3, and the stop valve 8 are closed, and the cooling water is pressurized by the baking small flow pump 2 and then heated by the baking heater before entering the divertor for high-temperature baking;

[0027] In the baking cooling mode, the safety isolation valve 1, the safety isolation valve 2, the safety isolation valve 3, and the safety isolation valve 4 in the cladding loop are opened, the stop valve 5, the stop valve 6, and the stop valve 7 are opened, the stop valve 1, the stop valve 2, the stop valve 3, and the stop valve 4 are closed, the flow regulating valve 1 and the flow regulating valve 2 are opened, and the cooling water is cooled by the baking cooler 1 and pressurized by the baking small flow pump 1 and then injected into the cladding to cool it;

[0028] In the baking cooling mode, safety isolation valve 5, safety isolation valve 6, safety isolation valve 7, and safety isolation valve 8 in the divertor loop are opened, stop valve 9 and flow regulating valve 3 are opened, stop valve 10 and stop valve 8 are closed, and the cooling water is pressurized by baking small flow pump 2, cooled by baking cooler 2, and then enters the divertor.

[0029] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0030] The fusion energy heat feeding system of the present invention can effectively transfer the heat load deposited on the blanket and the divertor to the steam power generation system for power generation, thereby ensuring efficient recovery and utilization of energy.

[0031] The present invention can provide high-temperature baking for the fusion reactor vacuum chamber to form a high vacuum environment that satisfies the operation of plasma, which helps to maintain the stable operation of plasma and ensures the normal operation of the tokamak device.

[0032] The present invention adopts two independent cooling circuit structures including a blanket cooling circuit and a divertor cooling circuit, thereby improving the stability of the system and ensuring the reliability of fusion reactor cooling.

[0033] In power generation mode and non-steady-state operation mode, reasonable design of cooling water flow direction and valve control can buffer heat load fluctuations, reduce the impact on the turbine, and ensure the safety and stability of the system under different operating conditions.

[0034] By using the heat load of the divertor to preheat the high-pressure feed water from the steam power generation system, the high-quality heat energy generated by the fusion reactor is fully utilized to improve energy utilization efficiency. By optimizing the use of equipment in cooling and baking modes, such as baking small flow pumps, heaters, and coolers, the existing equipment is used to the maximum extent, improving equipment utilization and the overall efficiency of the system.

[0035] After a water loss accident occurs in the system, the mass and energy release of the system can be effectively limited and the safety of the system can be ensured by reasonably designing the closing logic of the safety isolation valve. When the heat exchange pipe of the steam generator and the heat exchange pipe of the main heat exchanger rupture, the safety isolation valve on the secondary side can be closed to prevent the leakage of radioactive corrosive substances and protect the safety of personnel and the environment.

[0036] The setting of the pressure stabilizer can ensure the stable pressure operation of the system, absorb the changes in the system water volume caused by temperature fluctuations, and prevent the system from malfunctioning due to pressure fluctuations. The pressure relief box can condense the high-temperature steam from the pressure stabilizer when the system is over-pressured, ensuring the safe operation of the system and avoiding safety accidents caused by over-pressure.

[0037] The present invention effectively solves the problem of high-temperature baking of internal components of fusion reactors, realizes safe, stable and efficient output of fusion energy for power generation, alleviates energy shortage and environmental pollution, accelerates the practical application of nuclear fusion energy, and the system has multiple safety assurance mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic diagram of the structure of a fusion energy heat feed system loop structure.

[0039] Figure numerals: 1, cladding; 2, safety isolation valve 1; 3, safety isolation valve 2; 4, main circulation pump 1; 5, stop valve 1; 6, stop valve 2; 7, steam generator; 8, stop valve 3; 9, stop valve 4; 10, heater; 11, safety isolation valve 3; 12, safety isolation valve 4; 13, regulator 1; 14, pressure relief valve 1; 15, pressure relief box; 16, baking small flow pump 1; 17, stop valve 5; 18, stop valve 6; 19, flow control valve 1; 20, stop valve 7; 21, flow control valve 2; 22, baking cooler 1 ; 23. Divertor; 24. Safety isolation valve five; 25. Safety isolation valve six; 26. Main circulation pump two; 27. Main heat exchanger; 28. Safety isolation valve seven; 29. ​​Safety isolation valve eight; 30. Baking small flow pump two; 31. Stop valve nine; 32. Stop valve ten; 33. Baking heater; 34. Baking cooler two; 35. Flow regulating valve three; 36. Stabilizer two; 37. Pressure relief valve two; 38. Safety isolation valve nine; 39. Safety isolation valve ten; 40. Safety isolation valve eleven; 41. Safety isolation valve twelve; 42. Stop valve eight. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, a fusion energy heat feed system loop structure proposed by the present invention includes two independent cooling loops, namely a blanket cooling loop and a divertor cooling loop, which can improve the stability of the system and ensure the reliability of fusion reactor cooling.

[0043] The blanket cooling loop includes a blanket 1, a main circulation pump 4, a steam generator 7, a heater 10, and a stabilizer 13 connected in sequence to form a loop; a baking small flow pump 16 is connected in parallel to the main circulation pump 4, a flow regulating valve 19 and a baking cooler 22 are connected in parallel to the steam generator 7, and a flow regulating valve 21 is connected in parallel to the heater 10; a safety isolation valve 2 and a safety isolation valve 3 are connected in sequence between the blanket 1 and the main circulation pump 4, a stop valve 15 and a stop valve 26 are connected in sequence between the main circulation pump 4 and the steam generator 7; a stop valve 38 and a stop valve 49 are connected in sequence between the steam generator 7 and the heater 10; a safety isolation valve 311 and a safety isolation valve 412 are connected in sequence between the stabilizer 13 and the blanket 1. A stop valve 517 is connected between the baking small flow pump 16 and the stop valve 26, and a stop valve 618 and a stop valve 720 are installed at both ends of the divertor 23.

[0044] In addition, in the present embodiment, the divertor cooling loop includes the divertor 23, the main circulation pump 26, the main heat exchanger 27, the baking small flow pump 30, and the stabilizer 2 36, which are connected in sequence to form a loop; the baking small flow pump 30 is respectively connected to the baking heater 33, the flow regulating valve 35 and the baking cooler 2 34, the baking heater 33, the flow regulating valve 35 and the baking cooler 2 34 are arranged in parallel and communicated between the divertor 23 and the main circulation pump 2 26; the safety isolation valve 5 24 and the safety isolation valve 6 25 connected in sequence are installed between the divertor 23 and the main circulation pump 2 26, and the stop valve 8 42 is installed between the main circulation pump 2 26 and the main heat exchanger 27;

[0045] Furthermore, a safety isolation valve seven 28 and a safety isolation valve eight 29 connected in sequence are installed between the stabilizer two 36 and the divertor 23, a stop valve nine 31 is installed between the baking small flow pump 30 and the baking cooler two 34, and a stop valve ten 32 is installed between the baking small flow pump 30 and the baking heater 33.

[0046] It is particularly noted that a pressure relief assembly is connected between the blanket cooling loop and the divertor cooling loop. The pressure relief assembly includes a pressure relief box 15, the pressure relief box 15 is respectively connected to a pressure relief valve 14 and a pressure relief valve 2 37, the pressure regulator 13 is connected to the pressure relief valve 14, and the pressure relief valve 2 37 is connected to the pressure regulator 2 36.

[0047] The steam generator 7 is connected to the main heat exchanger 27, and the main heat exchanger 27 is connected to the safety isolation valve 9 38 and the safety isolation valve 10 39. The steam generator 7 is connected to the safety isolation valve 11 40 and the safety isolation valve 12 41 in sequence. The main functions of the pressure stabilizer 1 13 and the pressure stabilizer 2 36 are to ensure the stable pressure operation of the system and absorb the changes in the water volume of the system caused by temperature fluctuations. The main function of the pressure relief tank 15 is to condense the high-temperature steam from the pressure stabilizer 1 13 and the pressure stabilizer 2 36 when the system is over-pressured, so as to ensure the safe operation of the system.

[0048] The working modes of the loop structure of the fusion energy heat feed system include power generation mode and baking mode.

[0049] In the power generation mode, the safety isolation valve 1 2, the safety isolation valve 2 3, the stop valve 1 5, the stop valve 2 6, the stop valve 3 8, the stop valve 4 9, the safety isolation valve 3 11, and the safety isolation valve 4 12 in the blanket loop are opened, and the stop valve 5 17, the stop valve 6 18, and the stop valve 7 20 are closed;

[0050] After the cooling water is heated by the blanket 1, part of it passes through the heater 10, and part of it passes through the flow regulating valve 21, and then after converging, it passes through the steam generator 7 to heat the secondary side feed water to generate steam, and then is sent to the steam turbine to drive the steam turbine to generate electricity;

[0051] Then it is pressurized by the main circulation pump 4 and then re-injected into the blanket 1. When the fusion reactor is in non-steady-state operation, the heater 10 is turned on to heat the cooling water in order to produce steam to maintain the minimum speed of the turbine; the safety isolation valve five 24, the safety isolation valve six 25, the safety isolation valve seven 28, and the safety isolation valve eight 29 in the divertor loop are opened, the stop valve nine 31 and the stop valve ten 32 are closed, and the flow regulating valve three 35 is closed. After the cooling water is heated by the divertor 23, it passes through the main heat exchanger 27 to heat the high-pressure feed water on the secondary side, and then is pressurized and backfilled into the divertor 23 by the main circulation pump two 26.

[0052] The baking mode includes a baking heating mode and a baking cooling mode;

[0053] In the baking heating mode, the safety isolation valve 1 2, the safety isolation valve 2 3, the safety isolation valve 3 11, and the safety isolation valve 4 12 in the blanket loop are opened, the stop valve 4 9 and the stop valve 5 17 are opened, the stop valve 1 5, the stop valve 2 6, the stop valve 3 8, the stop valve 6 18, and the stop valve 7 20 are closed, the flow regulating valve 1 19 is opened, and the flow regulating valve 2 21 is closed, the cooling water is heated by the heater 10 and passes through the flow regulating valve 1 19, and then is pressurized by the baking small flow pump 16 and injected into the blanket 1 for high-temperature baking;

[0054] In the baking heating mode, the safety isolation valve five 24, the safety isolation valve six 25, the safety isolation valve seven 28, and the safety isolation valve eight 29 in the divertor loop are opened, the stop valve ten 32 is opened, the stop valve nine 31, the flow regulating valve three 35, and the stop valve eight 42 are closed, and the cooling water is pressurized by the baking small flow pump 30 and then heated by the baking heater 33 before entering the divertor 23 for high-temperature baking;

[0055] In the baking cooling mode, the safety isolation valve 1 2, the safety isolation valve 2 3, the safety isolation valve 3 11, and the safety isolation valve 4 12 in the blanket loop are opened, the stop valve 5 17, the stop valve 6 18, and the stop valve 7 20 are opened, the stop valve 1 5, the stop valve 2 6, the stop valve 3 8, and the stop valve 4 9 are closed, the flow regulating valve 1 19 and the flow regulating valve 2 21 are opened, and the cooling water is cooled by the baking cooler 1 22, pressurized by the baking small flow pump 16, and then injected into the blanket 1 to cool it;

[0056] In the baking cooling mode, the safety isolation valve five 24, the safety isolation valve six 25, the safety isolation valve seven 28, and the safety isolation valve eight 29 in the divertor loop are opened, the stop valve nine 31 and the flow regulating valve three 35 are opened, the stop valve ten 32 and the stop valve eight 42 are closed, and the cooling water is pressurized by the baking small flow pump 30, cooled by the baking cooler two 34, and then enters the divertor 23.

[0057] In this embodiment, when the blanket loop is in power generation mode, after the cooling water is heated by the blanket 1, part of the hot water passes through the heater 10, and the other part passes through the flow regulating valve 21, and then passes through the steam generator 7 after converging, and then is re-injected into the blanket 1 after being pressurized by the main circulation pump 4. In this way, the thermal load fluctuation caused by the fusion reactor in the non-steady-state operation mode can be buffered, and the impact of variable load on the steam turbine can be reduced.

[0058] In this embodiment, in the blanket loop under the baking mode, the cooling water first passes through the heater 10 to be heated, then part of the cooling water passes through the flow regulating valve 21, and the other part passes through the baking cooler 1 22, and then after the confluence, it passes through the baking small flow pump 16 to be pressurized and then re-injected into the blanket 1. This can improve the baking efficiency of the internal components of the tokamak and maximize the use of existing equipment.

[0059] In this embodiment, when the divertor loop is in power generation mode, the cooling water is heated by the divertor 23 and then passes through the main heat exchanger 27 , and then is pressurized by the main circulation pump 26 and then re-injected into the divertor 23 .

[0060] In the divertor loop in the baking mode, part of the cooling water passes through the baking heater 33, and the other part passes through the flow regulating valve 3 35, and then after the confluence, it is pressurized by the baking small flow pump 2 30 and then re-injected into the divertor 23. In this way, the temperature of the high-temperature baking hot water can be quickly adjusted, and the baking temperature can be flexibly adjusted according to the needs of the fusion reactor.

[0061] The feed water from the steam power generation system on the secondary side is preheated by the main heat transfer system of the divertor loop and then enters the steam generator 7 to generate steam. In this way, the heat load of the divertor 23 can be effectively used to preheat the high-pressure feed water from the steam power generation system, making full use of the high-grade thermal energy generated by the fusion reactor.

[0062] Example 2

[0063] After a water loss accident occurs in the system, safety isolation valve 1 2, safety isolation valve 2 3, safety isolation valve 3 11, safety isolation valve 4 12 and safety isolation valve 5 24, safety isolation valve 6 25, safety isolation valve 7 28 and safety isolation valve 8 29 are closed to limit the mass and energy release of the system.

[0064] When the heat exchange pipe of the steam generator 7 and the heat exchange tube of the main heat exchanger 27 rupture, the safety isolation valve 9 38, the safety isolation valve 10 39, the safety isolation valve 11 40 and the safety isolation valve 12 41 on the secondary side are closed to limit the leakage of radioactive corrosive substances.

[0065] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A fusion energy heat feed system loop structure, characterized in that: include: Blanket cooling loop and divertor cooling loop; The blanket cooling loop comprises a blanket (1), a main circulation pump (4), a steam generator (7), a heater (10), and a pressure stabilizer (13), which are connected in sequence to form a loop; The main circulation pump 1 (4) is connected in parallel with a baking small flow pump 1 (16), the steam generator (7) is connected in parallel with a flow regulating valve 1 (19) and a baking cooler 1 (22), and the heater (10) is connected in parallel with a flow regulating valve 2 (21); The divertor cooling loop comprises a divertor (23), a second main circulation pump (26), a main heat exchanger (27), a second baking small flow pump (30), and a second stabilizer (36), which are connected in sequence to form a loop; The second baking small flow pump (30) is respectively connected to a baking heater (33), a flow regulating valve (35) and a second baking cooler (34); the baking heater (33), the flow regulating valve (35) and the second baking cooler (34) are arranged in parallel and are connected between the divertor (23) and the second main circulation pump (26); A pressure relief assembly is connected between the blanket cooling loop and the divertor cooling loop.

2. A fusion energy heat feed system loop structure according to claim 1, characterized in that: A safety isolation valve 1 (2) and a safety isolation valve 2 (3) are connected in sequence between the cladding (1) and the main circulation pump 1 (4); a stop valve 1 (5) and a stop valve 2 (6) are connected in sequence between the main circulation pump 1 (4) and the steam generator (7); a stop valve 3 (8) and a stop valve 4 (9) are connected in sequence between the steam generator (7) and the heater (10); and a safety isolation valve 3 (11) and a safety isolation valve 4 (12) are connected in sequence between the pressure stabilizer 1 (13) and the cladding (1).

3. A fusion energy heat feed system loop structure according to claim 2, characterized in that: A stop valve five (17) is connected between the baking small flow pump one (16) and the stop valve two (6), and a stop valve six (18) and a stop valve seven (20) are respectively installed at both ends of the divertor (23).

4. A fusion energy heat feed system loop structure according to claim 3, characterized in that: A safety isolation valve five (24) and a safety isolation valve six (25) are installed between the divertor (23) and the main circulation pump two (26), and a stop valve eight (42) is installed between the main circulation pump two (26) and the main heat exchanger (27); A safety isolation valve 7 (28) and a safety isolation valve 8 (29) which are connected in sequence are installed between the second stabilizer (36) and the divertor (23).

5. A fusion energy heat feed system loop structure according to claim 4, characterized in that: A stop valve nine (31) is installed between the baking small flow pump two (30) and the baking cooler two (34), and a stop valve ten (32) is installed between the baking small flow pump two (30) and the baking heater (33).

6. A fusion energy heat feed system loop structure according to claim 5, characterized in that: The pressure relief assembly comprises a pressure relief box (15), the pressure relief box (15) is respectively connected to a pressure relief valve 1 (14) and a pressure relief valve 2 (37), a pressure stabilizer 1 (13) is connected to the pressure relief valve 1 (14), and the pressure relief valve 2 (37) is connected to the pressure stabilizer 2 (36).

7. A fusion energy heat feed system loop structure according to claim 6, characterized in that: The steam generator (7) is connected to the main heat exchanger (27), and the main heat exchanger (27) is connected to a safety isolation valve nine (38) and a safety isolation valve ten (39). The steam generator (7) is connected in sequence to a safety isolation valve eleven (40) and a safety isolation valve twelve (41).

8. A fusion energy heat feed system loop structure according to claim 7, characterized in that: The working modes of the fusion energy heat feed system loop structure include power generation mode and baking mode.

9. A fusion energy heat feed system loop structure according to claim 8, characterized in that: In the power generation mode, the safety isolation valve 1 (2), the safety isolation valve 2 (3), the stop valve 1 (5), the stop valve 2 (6), the stop valve 3 (8), the stop valve 4 (9), the safety isolation valve 3 (11), and the safety isolation valve 4 (12) in the blanket loop are opened, and the stop valve 5 (17), the stop valve 6 (18), and the stop valve 7 (20) are closed; After the cooling water is heated by the cladding (1), a portion of the cooling water passes through the heater (10) and a portion of the cooling water passes through the second flow regulating valve (21). The cooling water then passes through the steam generator (7) to heat the secondary side feed water to generate steam, which is then sent to the steam turbine to drive the steam turbine to generate electricity. Then, the cooling water is pressurized by the main circulation pump 1 (4) and then re-injected into the blanket (1). When the fusion reactor is in an unsteady-state operation, the heater (10) is turned on to heat the cooling water so as to generate steam to maintain the minimum speed of the steam turbine; the safety isolation valve 5 (24), the safety isolation valve 6 (25), the safety isolation valve 7 (28), and the safety isolation valve 8 (29) in the divertor loop are opened, the stop valve 9 (31) and the stop valve 10 (32) are closed, and the flow regulating valve 3 (35) is closed. After the cooling water is heated by the divertor (23), it passes through the main heat exchanger (27) to heat the high-pressure feed water on the secondary side, and then is pressurized by the main circulation pump 2 (26) and backfilled into the divertor (23).

10. A fusion energy heat feed system loop structure according to claim 8, characterized in that: The baking mode includes a baking heating mode and a baking cooling mode; In the baking heating mode, the safety isolation valve 1 (2), the safety isolation valve 2 (3), the safety isolation valve 3 (11), and the safety isolation valve 4 (12) in the cladding loop are opened, the stop valve 4 (9) and the stop valve 5 (17) are opened, the stop valve 1 (5), the stop valve 2 (6), the stop valve 3 (8), the stop valve 6 (18), and the stop valve 7 (20) are closed, the flow regulating valve 1 (19) is opened, and the flow regulating valve 2 (21) is closed, the cooling water is heated by the heater (10) and then passes through the flow regulating valve 1 (19), and then is pressurized by the baking small flow pump 1 (16) and injected into the cladding (1) to bake it at high temperature; In the baking heating mode, the safety isolation valve five (24), the safety isolation valve six (25), the safety isolation valve seven (28), and the safety isolation valve eight (29) in the divertor loop are opened, the stop valve ten (32) is opened, the stop valve nine (31), the flow regulating valve three (35), and the stop valve eight (42) are closed, and the cooling water is pressurized by the baking small flow pump two (30) and then heated by the baking heater (33) before entering the divertor (23) for high-temperature baking; In the baking cooling mode, the safety isolation valve 1 (2), the safety isolation valve 2 (3), the safety isolation valve 3 (11), and the safety isolation valve 4 (12) in the cladding loop are opened, the stop valve 5 (17), the stop valve 6 (18), and the stop valve 7 (20) are opened, the stop valve 1 (5), the stop valve 2 (6), the stop valve 3 (8), and the stop valve 4 (9) are closed, the flow regulating valve 1 (19) and the flow regulating valve 2 (21) are opened, and the cooling water is cooled by the baking cooler 1 (22), pressurized by the baking small flow pump 1 (16), and then injected into the cladding (1) to cool it; In the baking cooling mode, the safety isolation valve five (24), the safety isolation valve six (25), the safety isolation valve seven (28), and the safety isolation valve eight (29) in the divertor loop are opened, the stop valve nine (31) and the flow regulating valve three (35) are opened, the stop valve ten (32) and the stop valve eight (42) are closed, and the cooling water is pressurized by the baking small flow pump two (30), cooled by the baking cooler two (34), and then enters the divertor (23).

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